Being able to switch between output languages while interpreting would really be extremely helpful and time-saving!

Being able to raise/lower a hand by button on stream deck would be huge!

This feature would allow Slack huddles to work, but also is already built into the Stream Deck via multi-actions and hotkeys. It is not a global hotkey, so you do need to bring the app to the front before doing the Cmd + Shift + H/Space hotkey.